int main(void)
{
	/*定义指针指向寄存器地址*/
	unsigned int *pGPFCON	= (unsigned int *)0x56000050;
	unsigned int *pGPFDATA	= (unsigned int *)0x56000054;

	/*配置引脚*/
	*pGPFCON = 0x100;
	/*设置引脚输出电平*/
	*pGPFDATA = 0;
	
	return 0;
}
